102001223232020 has 72 divisors (see below), whose sum is σ = 249175967229000. Its totient is φ = 34971630355200.

The previous prime is 102001223232019. The next prime is 102001223232049. The reversal of 102001223232020 is 20232322100201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10847880006544 + 91153343225476 = 3293612^2 + 9547426^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 102001223231983 and 102001223232001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289807106 + ... + 290158854.

It is an arithmetic number, because the mean of its divisors is an integer number (3460777322625).

Almost surely, 2^{102001223232020} is an apocalyptic number.

102001223232020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102001223232020 is an abundant number, since it is smaller than the sum of its proper divisors (147174743996980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102001223232020 is a wasteful number, since it uses less digits than its factorization.

102001223232020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647673 (or 647664 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 102001223232020 its reverse (20232322100201), we get a palindrome (122233545332221).

The spelling of 102001223232020 in words is "one hundred two trillion, one billion, two hundred twenty-three million, two hundred thirty-two thousand, twenty".